.custom-resizer {
  > .pane {
    overflow: hidden;
  }
  > .multipane-resizer {
    margin: 0;
    &:before {
      display: block;
      content: "";
      width: 4px;
      height: 25px;
      position: absolute;
      margin-top: 25vh;
      border-left: 1.5px solid #999;
      border-right: 1.5px solid #999;
    }
    &:hover {
      &:before {
        border-color: #999;
      }
    }
  }
}
